Improved windlass



UNITED STATES PATENT OFFICE.

PETER H. JACKSON, OF NET YORK, AND SAMUEL EDDY, OF BROOKLYN, N.

IMPROVED WINDLASS.

Specification forming part of Letters Patent No. 46, l l0, dated January 31, l1865.

To all whom fit may concern:

Be it known that we, PETER H. JACKSON, of the city and State of New York, and SAM- UEL EDDY, of Brooklyn, in the county of Kings and State of New York, have invented, made, and applied to use a certain new and useful Improvement in Windlasses; and we do hereby declare the following to be a full, clear, and exact description of the said invention, reference being had to the annexed drawings, making part of this specication, Where- 111- -Figure l is a vertical section of our improved windlass, and Fig. 2 is an inverted plan representing the under side of the chainwheel.

Similar marks of reference denote the same parts.

The nature ot' ourA said invention consists in a series of movable radial ribs that act as clamps to confine the links of a chain passed around a wheel, in which such movable radial ribs are fitted; and said radial ribs are moved or drawn back in a portion of the circle in which they rotate, so that the chainlinks are dropped successively at the points where the chain leads away from t-he chainwheel. By this construction the chain-wheel is adapted to a variety of sizes of chains, and there is no risk of the links becoming wedged into the wheel, because the withdrawal of the radial ribs successively leaves the chain entirely free at the point of delivery.

In the drawings, a represents the base of the windlass from which the center shaft or axis, b, rises and receives the capstan-barrel c, that may be ot' any usual character, and also the chainwvheel d, to which our improvement relates, and which chain-wheel forms the windlass for working the chain-cable. The said chain-wheel is represented as connected with the capstan and deriving its rotary movement from the same, handspike-sockets being provided in the head of the said capstan; but it will be apparent that the said windlass can be rotated by any suitableV means. Around the base of our chain-wheel d pawls e e are affixed, taking the pawlbed at l 1, around the base a, or said pawls may be fitted in any other convenient manner.

j' f are our radial ribs hinged at their inner ends and sett-ing within mortises formed through the lower flange or disk of the chainwheel. These radial ribs are provided with rollers 2 2, that travel upon the upper surface of the bed a as the chain-wheel revolves, and said surface oi' a is formed with a depression at 3, occupying about one-third of the circumference of said base, the rest of said base being level, as at 4. The said depression is formed as a gradual incline, (from 4 to 3,) so that the rollers 2 2, traveling over the surface of a, allow the ribs f to descend, and then again raise such ribs.v The chaincable is passed around this chain-wheel in the usual manner, coming in on one side of said wheel and going oft' on the other, said parts of the chain, in approaching and leaving the windlass, being nearly parallel, and the chain itself forming a half-circular bend around the windlass. The base a. is to be so placed relatively to the lead of the chain, that the high port-ion 4t shall be at the part where the chain passes around the windlass, while the low portion 3 is at the part where the chain leaves the windlass.

The result of this arrangementwill be apparent-viz., that the ribs j' are forced up in succession and take the chain-links as they are drawn in by the revolution of the windlass, and that they descend or draw away from the chain at the point where said chain leaves the chain-wheel. WVe prefer and use ribs on the upper side of the annular space of the chain-wheel, as at 5 5, so that the chain will be less liable to slip, because the vertical links ofthe chain will bear against the sides of said ribs, while the horizontal links lie between said ribs. We also make the surfaces ot' the disks, forming the top and bott-om of the annular space for the chain, with offsets at 6 6,

.so that the larger sizes of chains will not enter the smaller part of the recess, but their vertical links be supported by said offsets, while the smaller sizes of chain will pass into thc narrower part of the annular recess.

The movable radial ribs may be constructed with longer rollers than those shown, so as`to take a larger bearing on the surface of the base a, or two or more rollers may be applied to each of these radial ribs. The outer ends of the radial ribs may be fitted so as to enter a stationary slot, to draw them down or awa-y from the chain, or any other convenient device may be resorted to for insuring the radial rib drawing away from the alain-links the same to dierent sizes of chain, as speciand leaving the chain free. fled.

What We eaim, and desire to secure by Let In witness whereof we have hereunto set our ters Patent, is* signatures this 13th day ofDecember, 1864.

1. A chain-Wheel or windlass formed with PETER H. JACKSON. radial ribs that are movable, substantially as SAMUEL EDDY.

specied. VVit-nesses 2. Forming the annular space around a LEMUEL W. SERRELL, chain-Wheel with offsets 6 6, to better adapt GHAS. H. SMITH. 

